[Albertafriend]

One thing that has always betrayed this photo as a fake is that tiny seemingly insignificant triangle of light blue between 0 and Grandpa’s shoulders. There is absolutely no reason for anything to be blue there!

[Fred Nerks]

That patch of wall that shouldn't be there was placed where it is to fool the eye into accepting that Stanley Armour's arm wasn't at his side; it's the only way the eye can be fooled into accepting that fake hand on zero's shoulder.

For every fake there's a need.

The need was to show there was still a relationship between the Dunhams and zero at the time he was in New York.

There wasn't. There is no more evidence of any kind of them ever being together after that obvious fake in Central Park. The last genuine photograph of the Dunhams with zero might have been the one at his graduation in Hawaii in 1979.

They took a photo of him sitting with his back to the lake, and posed him so that he would fit between the Dunhams:

And that's why the sun is shining on his hand: